Improvement in stone-crushers



Patented Nov. 21, 1871.

Improvement in Stone Crushers.-

1 ETER W000.

UNITED STATES PATENT QFFICE.

PETER WOOD, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT lN STONE-CRUSHERS.

Specification forming part of Letters Patent No. 121,143, dated November21, 1871.

To all whom it may concern:

Be it known that I, PETER \VOOD, of Jersey City, in the county of Hudsonand State of New Jersey, have invented a new and Improved Stone-Orusher; and I do hereby declare that the following is a full, clear,and exact description thereof,

. which will enable others skilled in the art to make and use the same,reference being had to the accompanying drawing forming part of thisspecification.

Figure 1 represents a vertical longitudinal section of my improvedstone-crusher. Fig. 2 is a face view of the movable jaw. Fig. 3 is aface view of the same without the face-plate. Fig. 4, a detailtransverse section of the same on the line a c, Fig. 1. Fig. 5 is a sideview of the pitman; Fig. 6, an end view of the same; Fig. 7, a detaillongitudinal section of part of the vibrating lever; and Fig. 8, atransverse section of the same on the line is is, Fig. 7.

Similar letters of reference indicate corresponding parts.

My invention consists in the improvement of stone-crushers, ashereinafter fully described and subsequently pointed out in the claims.

A in the drawing represents the frame of the ore-crusher. B is thecrank-shaft, hung in the back portion of the frame, and receiving rotarymotion by suitable mechanism. G is the pitman connecting the crank ofthe shaft B with the lever D, which, by means of the toggle-levers E,imparts vibrating motion to the jaw F. G is the stationary jaw, and H aspring for drawing the movable jaw away from the jaw G. The generalarrangement of these parts, as far as their effect upon one another isconcerned, is the same as in Blakes crusher, and not invented by me.

My improvement consists, first, in making the pitman O in two sections,as shown in Figs. 1, 5, and 6. The lower or main section a extends fromthe lower end up against the crank of the shaft B and receives the cap bplaced over said crank. A strap, d, is laid over the cap and fastened tothe lower section a by gib and key 0, be ing held in place by aset-screw, f. By this arrangement the unshipping of parts fortransportation and other purposes is greatly facilitated. My secondimprovement consists in providing the lever D with a removablehard-metal fulcrum piece, 9, and with a removable hardened bearingblock, h, for the toggle-levers. The fulcrum-piece g is set against thefront end of the lever and fastened thereto by boltsi t. Its shape issuch as to constitute a double bearing for the lever. The block hisfitted into a groove provided in the upper face of the lever, and may beprevented from lateral displacement by suitable means. Finally, myimprovement consists in providing the movable jaw F with a removablereversible hard-metal face-plate, I, and in the peculiar arrangement ofthe latter. The jaw has a recess formed in it, into which'the face-plateI is secured. The lower end of the face-plate rests on a shoulder, j, ofthis recess. Its upper end, however, abuts against a strip, 1, fittedinto the upper part of the recess and fastened to the jaw by bolts m.The upper and lower edges of the face-plate being both beveled, it isthus held in place without the use of fastening-bolts, pins, or devicesapplied directly to or through it. The face of the plate I is corrugatedto present rounded shallow grooves and ribs, as shown in Fig. 4, wherebypressure surface is enlarged. The edges n a of the plate are quitesharp, and fit flush against the checks of the frame to prevent stonesor dust from working between. The lower part of the grooved face issomewhat beveled to enlarge the lower point of contact and greatestpressure. On top the plate I has a similar form, so that it may bereversed when worn at the lower end. When entirely worn the plate I canbe removed from the jaw'and replaced by another. The back of the plate Iand the face of the recess in the jaw F are both grooved, as-

indicated in Figs. 3 and 4. Soft metal is cast into these grooves andallowed to flow along the entire back of the plate I for properlysetting the same. 0 is a removable hard-metal block fitted into a groovein the back of the jaw F for the toggle-levers to bear against.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. The jaw F, having recess for the face-plate beveled at j, combined asdescribed, with a beveled strip, L, and bolts m to embody a new mode ofattaching the face-plate to the jaw.

2. The back-grooved face-plate I and frontgrooved jaw F, combined withthe soft-metal filling cast therein, as and for the purpose specified.

The above specification of my invention signed by me this 19th day ofJuly, 1871.

Witnesses: PETER WOOD.

GEORGE W. MABEE, T. B. MosHER. (3)

